He was a multiple-time All American for the Notre Dame Fighting Irish and finished 3rd in the 300 m at the 2015 USA Indoor Track and Field Championships.

[2] Feeney maintained a rivalry with Chris Giesting, who he raced at the Indiana high school state meet before they became teammates at Notre Dame.

Outdoors, he anchored the winning U.S. 4 × 400 m team at the Penn Relays and set the KBC Night of Athletics meeting record in the 300 m, running 32.69 seconds.

For the finals, Feeney and Elvyonn Bailey were replaced by Vernon Norwood and Kyle Clemons, and the United States won the gold medal.

[3][2] Feeney attempted to qualify to represent the United States at the 2016 Summer Olympics while unsponsored, having to rely on his parents and a GoFundMe fundraiser.